[PATCH] mark struct file_operations const 8

Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 9 insertions, 9 deletions

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index c80df455802d..8612044b9189 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -282,9 +282,9 @@ static DEFINE_SPINLOCK(cache_list_lock);
 static struct cache_detail *current_detail;
 static int current_index;
 
-static struct file_operations cache_file_operations;
-static struct file_operations content_file_operations;
-static struct file_operations cache_flush_operations;
+static const struct file_operations cache_file_operations;
+static const struct file_operations content_file_operations;
+static const struct file_operations cache_flush_operations;
 
 static void do_cache_clean(struct work_struct *work);
 static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
@@ -887,7 +887,7 @@ cache_release(struct inode *inode, struct file *filp)
 
 
 
-static struct file_operations cache_file_operations = {
+static const struct file_operations cache_file_operations = {
         .owner          = THIS_MODULE,
         .llseek         = no_llseek,
         .read           = cache_read,
@@ -1245,7 +1245,7 @@ static int content_release(struct inode *inode, struct file *file)
         return seq_release(inode, file);
 }
 
-static struct file_operations content_file_operations = {
+static const struct file_operations content_file_operations = {
         .open           = content_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
@@ -1297,7 +1297,7 @@ static ssize_t write_flush(struct file * file, const char __user * buf,
         return count;
 }
 
-static struct file_operations cache_flush_operations = {
+static const struct file_operations cache_flush_operations = {
         .open           = nonseekable_open,
         .read           = read_flush,
         .write          = write_flush,
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 89273d35e0cc..e1fad77a2257 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -309,7 +309,7 @@ rpc_pipe_ioctl(struct inode *ino, struct file *filp,
         }
 }
 
-static struct file_operations rpc_pipe_fops = {
+static const struct file_operations rpc_pipe_fops = {
         .owner          = THIS_MODULE,
         .llseek         = no_llseek,
         .read           = rpc_pipe_read,
@@ -366,7 +366,7 @@ rpc_info_release(struct inode *inode, struct file *file)
         return single_release(inode, file);
 }
 
-static struct file_operations rpc_info_operations = {
+static const struct file_operations rpc_info_operations = {
         .owner          = THIS_MODULE,
         .open           = rpc_info_open,
         .read           = seq_read,
diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
index bd98124c3a64..044d9484bb8c 100644
--- a/net/sunrpc/stats.c
+++ b/net/sunrpc/stats.c
@@ -66,7 +66,7 @@ static int rpc_proc_open(struct inode *inode, struct file *file)
         return single_open(file, rpc_proc_show, PDE(inode)->data);
 }
 
-static struct file_operations rpc_proc_fops = {
+static const struct file_operations rpc_proc_fops = {
         .owner = THIS_MODULE,
         .open = rpc_proc_open,
         .read  = seq_read,